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Full Discussion: Permission denied
Top Forums UNIX for Dummies Questions & Answers Permission denied Post 302893971 by bakunin on Saturday 22nd of March 2014 01:49:16 PM
Old 03-22-2014
Quote:
Originally Posted by chinababy
when i run echo "User” > /dev/tty5 why do i get permission denied? Smilie
Because you are not allowed to do that. ;-))

Seriously: check the permissions of file "/dev/tty5" with the command

Code:
ls -l /dev/tty5

and have a look. Every file (device files are files too) carry a "r" (read), a "w" (write) and a "x" (execute) privilege for the owner, the owners group and every other user. See "man ls" for more details about this. Here is one of my systems:

Code:
# ls -l /dev/tty5
crw------- 1 root root 4, 5 Mar  4 15:51 /dev/tty5

As you can see the user "root" has "rw", his group (accidentally also named "root") has no rights at all and everybody else has no rights either.

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

ns_requestauthorize

ns_requestauthorize(3aolserver) 			    AOLserver Built-In Commands 			   ns_requestauthorize(3aolserver)

__________________________________________________________________________________________________________________________________________________

NAME

       ns_requestauthorize - commands

SYNOPSIS

       ns_requestauthorize option ?arg arg ...?
_________________________________________________________________

DESCRIPTION

   ns_requestauthorize method URL authuser authpassword ?ipaddr?
       Ask  the  server  to check permissions using nsperm.  This function does the same permission check that the AOLserver does before serving a
       URL. If the nsperm module is loaded, the algorithm is as follows.

       1. If the authuser is "nsadmin", the password is correct, and the IP address of the client is allowed nsadmin access, then access is autho-
	  rized.

       2. Find the relevant permission record. If an exact match for the method and URL combination is not found, the end of the URL is pared down
	  until a match is found. For example, if there is no match for `/products/cereals/raisin_bran.html,' then the server looks for a  permis-
	  sion record for the URL `/products/cereals.' If that permission record is specified as "Exact URL match is NOT required", then that per-
	  mission record is used.

       By default, the server comes with a row that says GET on `/' is open to the world. If no relevant permission record  is	found,	access	is
       denied (forbidden).

       1. If the authuser is in the "Allow Users" list, access is permitted. If the authuser is a member of a group in the "Allow Groups" list and
	  not in the "Deny Users" list, access is permitted.

       2. If the host is in the "Hosts to allow" list, access is permitted. If the host is in the "Hosts to deny" list, access is denied.

       3. If the request does not come in with authorization data, access is denied.

       4. The user and password are verified. If there is no password specified in the database, any password is accepted.

       5. Otherwise, access is denied.

   Return Values:
       The following values can be returned by ns_requestauthorize.

       OK	  The user has permission to execute this URL and method.

       DENIED	  The user does not have permission to execute this URL and method.

       FORBIDDEN  There is no possible user/password/IP Address combination that would give authorization.

       ERROR	  There was an error.

SEE ALSO

       ns_passwordcheck, ns_crypt

KEYWORDS

AOLserver								4.0					   ns_requestauthorize(3aolserver)
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